Has anyone had that happen yet and if so, why did the employment agencies not want to work with you anymore?

Felony is one of the reasons. Convicted felons have limited rights relative to employment. Private employers and government agencies can inquire into a job applicant’s criminal record, conduct criminal background checks and take information relative to a felony conviction into consideration. However, convicted felons do have a right to ensure that prospective employers follow Equal Employment Opportunity Commission guidelines in weighing the relationship between the conviction and necessary job qualifications.